"Mommy, when will your eyes stop being red?"
"I don't know."
"Why are they red all the time now?"
"Because a piece of my heart is missing."
"That makes you have red eyes?"
"I guess so."
"Will your missing piece grow back?"
"No, your brother took it with him."
"Then how will your heart work?"
"The other three parts of my heart are so strong that they'll keep it working. Maybe even harder than before."
"Good, because I need you, Mommy. I need your heart to work again."
"I know, sweet baby." (And that's why I'll stay.)